CN205064391U - Anti -cavitation structure of semi -open impeller centrifugal pump - Google Patents
Anti -cavitation structure of semi -open impeller centrifugal pump Download PDFInfo
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- CN205064391U CN205064391U CN201520771983.9U CN201520771983U CN205064391U CN 205064391 U CN205064391 U CN 205064391U CN 201520771983 U CN201520771983 U CN 201520771983U CN 205064391 U CN205064391 U CN 205064391U
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- centrifugal pump
- cavitation
- spiral case
- metal insert
- semi
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Abstract
The utility model provides an anti -cavitation structure of semi -open impeller centrifugal pump, including semi -open impeller, spiral case and spiral case front pump wall, still include a metal insert, metal insert is the ring in the smooth excircle ring sum of connecting of integration, outer ring is the level ring, interior ring is the slope ring, on metal insert is fixed in spiral case front pump wall, and it is coaxial with semi -open impeller, the length of streamline before the width more than or equal to semi -open impeller's of interior ring the blade. This anti -cavitation structure has not only reduced hydraulic losses, has improved the flow state of the inside medium of semi -open impeller, is showing the anti -cavitation ability of having improved semi -open impeller centrifugal pump spiral case front pump wall moreover, has improved the work efficiency and the life of centrifugal pump, the anti -cavitation method is simple, it is convenient to implement, greatly reduced the transformation cost of centrifugal pump.
Description
Technical field
The utility model belongs to centrifugal pump technical field, especially relates to a kind of anti-cavitation structure of centrifugal pump with semien closed impellerpump.
Background technique
Cavitation phenomenons has seriously constrained the development of engine cooling water pump.Engine cooling water pump is as the vitals of engine water-cooling system for water, and its physical dimension is subject to the restriction in space, and works under high temperature, variable speed, large discharge operating mode, very easily cavitation damage occurs.Meanwhile, engine cooling water pump is equipped with half-opened impeller usually, and half-opened impeller is in suction port side without cover plate, and blade edge backflow is comparatively large, and this exacerbates the possibility that cavitation occurs.Because engine cooling water pump complex structure, volume are little, the pump housing is mostly cast and is formed, cavitation damage in spiral case front pump wall and runner is solved always well, except being improved except anti-cavitation performance by conventional Optimum Hydraulic Design, urgently find a kind of new techniques and methods to prevent cavitation damage.Application number be 201410394785.5 utility model patent disclose a kind of anti-cavitation water pump vane, anti-cavitation zinc-nickel layer is established on blade, hub seat and fixed shaft hole surface, and improve the anti-cavitation performance of half-opened impeller by the coming off of inducing layer monitoring anti-cavitation zinc-nickel layer under coating, but there is following shortcoming in it: because half-opened impeller is rotary component, anti-cavitation coating easily comes off, and the stability of supervisory device is also subject to huge test.
Model utility content
There is the hypodynamic defect of anti-cavitation energy of rupture in the spiral case front pump wall for centrifugal pump with semien closed impellerpump in prior art, the utility model provides a kind of anti-cavitation structure of centrifugal pump with semien closed impellerpump, object is the anti-cavitation performance significantly improving spiral case front pump wall, thus improves efficiency and the working life of centrifugal pump.
The utility model realizes above-mentioned technical purpose by following technological means.
An anti-cavitation structure for centrifugal pump with semien closed impellerpump, comprise half-opened impeller, spiral case and spiral case front pump wall, also comprise a metal insert, described metal insert comprises the outer toroid of integrated optical slip and interior annulus; Described outer toroid is horizontal loops; Described interior annulus is inclined ring; Described metal insert is fixed on spiral case front pump wall, and coaxial with half-opened impeller; The width of described interior annulus is more than or equal to the length of streamline before the blade of half-opened impeller.
Preferably, described interior annulus is parallel with streamline before blade.
Preferably, before described interior annulus and blade, the spacing of streamline is not more than 1mm.
Preferably, the thickness of described metal insert is 1-3mm.
Preferably, the material of described metal insert is stainless steel, alloyed steel, casting manganese, bronze or Langaloy.
Preferably, described outer toroid is provided with multiple hole, and described outer toroid and spiral case front pump wall are for being threaded.
When centrifugal pump with semien closed impellerpump generation cavitation, bubble moves along the Way out of half-opened impeller blade, will produce when bubble moves to the zone of high pressure near spiral case front pump wall and shrink and crumble and fall, the instant impact produced of crumbling and fall acts on the fixing metal insert of spiral case front pump wall, prevents spiral case front pump wall to suffer cavitation damage.
The beneficial effects of the utility model:
The anti-cavitation structure of centrifugal pump with semien closed impellerpump described in the utility model, by installing the metal insert coaxial with half-opened impeller in original spiral case front pump wall outside, not only reduce hydraulic loss, improve the flowing state of half-opened impeller interior media, and significantly improve the anti-cavitation performance of centrifugal pump with semien closed impellerpump spiral case front pump wall, improve working efficiency and the working life of centrifugal pump.
Accompanying drawing explanation
Fig. 1 is the structural drawing of the anti-cavitation device of centrifugal pump with semien closed impellerpump described in the utility model.
Fig. 2 is the plan view of metal insert described in the utility model.
Description of reference numerals is as follows:
1-metal insert, 2-half-opened impeller, 3-spiral case front pump wall, 4-spiral case, 5-outer toroid, 6-hole, annulus in 7-.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment, the utility model is further described, but protection domain of the present utility model is not limited to this.
As depicted in figs. 1 and 2, a kind of anti-cavitation structure of centrifugal pump with semien closed impellerpump, comprise half-opened impeller 2, spiral case 4 and spiral case front pump wall 3, also comprise a metal insert 1, the material of described metal insert 1 is stainless steel, alloyed steel, casting manganese, bronze or Langaloy, the thickness of described metal insert 1 is 1-3mm, so both prevents metal insert to be out of shape, and can reduce costs again.
Described metal insert 1 comprises outer toroid 5 and interior annulus 7; Described outer toroid 5 is horizontal loops, and outer toroid 5 is provided with multiple hole 6, is placed with bolt and nut in hole 6, described outer toroid 5 and spiral case front pump wall 3 for being threaded, for fixing metal inserts 1.
Described interior annulus 7 is inclined ring, and namely, the outward edge of annulus 7 and inward flange be not in same level, and its side view is an oblique line; Described outer toroid 5 forms metal insert 1 with interior annulus 7 integrated optical slip; Described metal insert 1 is fixed on spiral case front pump wall 3, and coaxial with half-opened impeller 2.Described interior annulus 7 is parallel with streamline before blade, and the width of interior annulus 7 is more than or equal to the length of streamline before the blade of half-opened impeller 2, can protect the cavitation damage of spiral case front pump wall 3 from import to exit region so more broadly; Before interior annulus 7 and blade, the spacing of streamline is not more than 1mm.The utility model not only reduces hydraulic loss, improves the flowing state of half-opened impeller interior media, and significantly improves the anti-cavitation performance of centrifugal pump with semien closed impellerpump spiral case front pump wall, improves working efficiency and the working life of centrifugal pump; Anti-cavitation method described in the utility model is simple, enforcement is convenient, greatly reduces the reforming cost of centrifugal pump.
Utilize the anti-cavitation method of this anti-cavitation structure, comprise the steps:
S1: process ring-shaped step at spiral case front pump wall 3, the thickness of the aspect ratio outer toroid 5 of described step has more 1-2mm;
S2: outer toroid 5 will process multiple hole 6, the outer toroid 5 processing integrated optical slip subsequently forms metal insert 1 with interior annulus 7;
S3: the step of spiral case front pump wall 3 that the outer toroid 5 of metal insert 1 described in step S2 is threaded;
S4: coaxially install half-opened impeller 2 in the rear end of metal insert 1, make interior annulus 7 parallel with streamline before blade, and spacing is not more than 1mm.
When centrifugal pump with semien closed impellerpump generation cavitation, bubble moves along the Way out of half-opened impeller 2 blade, will produce when bubble moves to the zone of high pressure near spiral case front pump wall 3 and shrink and crumble and fall, the instant impact produced of crumbling and fall acts on the fixing metal insert 1 of spiral case front pump wall 3, prevents spiral case front pump wall 3 to suffer cavitation damage.
Described embodiment is preferred embodiment of the present utility model; but the utility model is not limited to above-mentioned mode of execution; when not deviating from flesh and blood of the present utility model, any apparent improvement that those skilled in the art can make, replacement or modification all belong to protection domain of the present utility model.
Claims (6)
1. the anti-cavitation structure of a centrifugal pump with semien closed impellerpump, comprise half-opened impeller (2), spiral case (4) and spiral case front pump wall (3), it is characterized in that, also comprise a metal insert (1), described metal insert (1) comprises outer toroid (5) and the interior annulus (7) of integrated optical slip; Described outer toroid (5) is horizontal loops; Described interior annulus (7) is inclined ring; Described metal insert (1) is fixed on spiral case front pump wall (3), and coaxial with half-opened impeller (2); The width of described interior annulus (7) is more than or equal to the length of streamline before the blade of half-opened impeller (2).
2. the anti-cavitation structure of a kind of centrifugal pump with semien closed impellerpump according to claim 1, is characterized in that, described interior annulus (7) is parallel with streamline before blade.
3. the anti-cavitation structure of a kind of centrifugal pump with semien closed impellerpump according to claim 2, is characterized in that, before described interior annulus (7) and blade, the spacing of streamline is not more than 1mm.
4. the anti-cavitation structure of a kind of centrifugal pump with semien closed impellerpump according to claim 1, is characterized in that, the thickness of described metal insert (1) is 1-3mm.
5. the anti-cavitation structure of a kind of centrifugal pump with semien closed impellerpump according to claim 1, is characterized in that, the material of described metal insert (1) is stainless steel, alloyed steel, casting manganese, bronze or Langaloy.
6. the anti-cavitation structure of a kind of centrifugal pump with semien closed impellerpump according to claim 1, it is characterized in that, described outer toroid (5) is provided with multiple hole (6), and described outer toroid (5) and spiral case front pump wall (3) are for being threaded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520771983.9U CN205064391U (en) | 2015-09-30 | 2015-09-30 | Anti -cavitation structure of semi -open impeller centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520771983.9U CN205064391U (en) | 2015-09-30 | 2015-09-30 | Anti -cavitation structure of semi -open impeller centrifugal pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205064391U true CN205064391U (en) | 2016-03-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520771983.9U Expired - Fee Related CN205064391U (en) | 2015-09-30 | 2015-09-30 | Anti -cavitation structure of semi -open impeller centrifugal pump |
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| CN (1) | CN205064391U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105134667A (en) * | 2015-09-30 | 2015-12-09 | 江苏大学 | Anti-cavitation structure and method of semiclosed-type impeller centrifugal pump |
-
2015
- 2015-09-30 CN CN201520771983.9U patent/CN205064391U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105134667A (en) * | 2015-09-30 | 2015-12-09 | 江苏大学 | Anti-cavitation structure and method of semiclosed-type impeller centrifugal pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160302 Termination date: 20160930 |